| #!/usr/bin/awk -f | |
| # Copyright (c) 2020 International Business Machines Corporation | |
| # Prepared by: Geert Janssen <geert@us.ibm.com> | |
| # Expects a C tokenizer generated csv file as input. | |
| # Recognizes identifiers and checks them against a list of all standard | |
| # C library functions (from /usr/include header files). | |
| # If the identifier matches, then its token class is modified: | |
| # from "identifier" to "std_func" | |
| # All other tokens are untouched. | |
| function dirname(pathname) { | |
| if (!sub(/\/[^\/]*\/?$/, "", pathname)) | |
| return "." | |
| return pathname | |
| } | |
| BEGIN { | |
| # Read the file of all C standard function names, one per line | |
| # Get directory where this script resides (ugly hack): | |
| getline cmdline <("/proc/"PROCINFO["pid"]"/cmdline") | |
| split(cmdline, fields, "\0") | |
| path = dirname(fields[3]) | |
| input = path "/std-C-lib-funcs.txt" | |
| while ((rc = (getline line < input)) > 0) { | |
| std_funcs[line]=1 | |
| } | |
| close(input) | |
| if (rc < 0) | |
| print "(W) cannot open " input | |
| FS="," | |
| } | |
| { | |
| # read csv | |
| # check for identifier in column 3 (class) | |
| if ($3 == "identifier" && $4 in std_funcs) { | |
| # separate out certain identifiers: | |
| print $1","$2",std_func,"$4 | |
| } | |
| else { | |
| print $0 | |
| } | |
| } | |
| END {} | |